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Amino Acids

38 Amino Acids compounds, 22 at evidence level A, average absorption 85%. Forms differ mostly in how much of the dose actually reaches you, not in what they do.

0 compounds
0 interactions
0 evidence A

Most used forms

Ranked by popularity, with what each one actually does

Creatine Monohydrate

Strength & power enhancement

3-5g Post workout with carbs Evidence A 95% absorbed

L-Carnitine

Fat metabolism & energy

1-3g Pre workout or meals Evidence A 85% absorbed

Beta-Alanine

Muscular endurance & fatigue resistance

3-5g Divided doses with meals Evidence A 90% absorbed

Creatine HCL

Enhanced muscle building

1.5-3g Pre or post workout Evidence B 98% absorbed

What people take these for

7 goals
Performance 18 Brain & Focus 9 Energy & Metabolism 7 Sleep & Stress 5 Immunity 5 Heart 3 Skin & Hair 3

Choosing between forms

Same compound, different absorption
Creatine HCL vs Creatine Monohydrate 98% · 95%

All 38 compounds

dose · evidence · documented interactions
Creatine Monohydrate Strength & power enhancement 3-5g A 5 L-Carnitine Fat metabolism & energy 1-3g A 5 Beta-Alanine Muscular endurance & fatigue resistance 3-5g A 5 BCAA (Branched-Chain Amino Acids) Muscle recovery & protein synthesis 10-20g B 5 Creatine HCL Enhanced muscle building 1.5-3g B 5 L-Citrulline Athletic performance & circulation 3-8g A 5 L-Leucine Muscle protein synthesis & recovery 2.5-10g A 5 Citrulline Malate Pre-workout performance & pumps 6-8g A 4 EAA (Essential Amino Acids) Complete muscle protein synthesis 10-30g A 5 L-Isoleucine Muscle energy & endurance support 1-6g A 5 L-Glutamine Gut health & muscle recovery 5-15g A 5 Arginine AKG Strength & muscle pumps 8-15g B 5 L-Theanine Calm focus & stress relief 100-400mg B 5 L-Valine Muscle coordination & mental vigor 1-6g A 5 L-Arginine Cardiovascular & circulation support 3-6g A 5 L-Tyrosine (Thyroid Support) Thyroid & cognitive support 500-2000mg B 5 Taurine Cardiovascular & exercise support 1-3g A 5 L-Lysine Immune support & collagen synthesis 1-3g A 5 Glycine Sleep quality & collagen support 3-10g A 5 L-Glutamic Acid Brain function & immune support 2-6g A 5 L-Tyrosine Stress response & cognitive support 500-2000mg A 5 L-Tryptophan Sleep support & mood enhancement 500-2000mg A 5 NAC (N-Acetyl-L-Cysteine) Liver detox & antioxidant support 600-1200mg A 5 HMB (β-Hydroxy β-Methylbutyrate) Muscle protection & recovery 3g B 5 L-Aspartic Acid Energy production & athletic performance 2-6g B 5 L-Methionine Detoxification & methylation support 500-1500mg A 5 L-Cysteine Antioxidant & detox support 500-1500mg A 5 L-Phenylalanine Mood & cognitive support 500-1500mg B 5 L-Serine Brain health & cognitive function 2-5g B 5 L-Threonine Immune & digestive support 500-1500mg A 5 Acetyl-L-Carnitine Brain energy & cognitive support 1000-3000mg B 5 L-Alanine Glucose metabolism & muscle energy 2-6g B 5 L-Histidine Tissue healing & immune support 500-2000mg A 5 L-Proline Collagen & joint support 1-3g B 5 GABA (Gamma-Aminobutyric Acid) Natural relaxation & anxiety relief 250-1000mg C 5 L-Asparagine Nervous system & immune support 1-5g B 5 L-Carnosine Muscle buffering & cellular protection 500-2000mg C 5 L-Norvaline Pump extension & NO sustainability 100-300mg C 5

Common questions

Which amino acids form is best absorbed?

EAA (Essential Amino Acids) leads at 99% bioavailability. Absorption is the number that decides how much of the dose reaches you, so it matters more than the milligrams on the label.

What is the difference between amino acids forms?

They deliver the same active compound but differ in absorption, tolerance and cost per month. The cheaper forms are usually the ones absorbed least.